I don't know who you are, but I am giving you the biggest hug in my head.

I'm not sure about testing kits, but there is naloxone, which is becoming part of standard operating procedure in reversing overdoses and is even available OTC in some states. If something is learned from your daughter's death, I hope that the availability of naloxone becomes better known and even more widely adopted.

My parents were devastated when my brother died. Coping with his death very nearly killed my mother, and almost certainly killed my father. As cliché as it sounds, there is life after death, and you have loved ones who will help you through this. Not believing that probably worsened my parents' state of mind. I wish you strength, peace, and light in the coming months.